NGDB Linked Open Data

A Knowledge Base Extracted from National Geochemical Database: Rock

What is this?

NGDB-LinkedData is a prototype/demonstration Knowledge Base composed of information extracted from National Geochemical Database: Rock, and is freely available using Semantic Web and Linked Data standards. The knowlege base currently contains over 12.1 million statements about the Rock Samples collected and analyzed by the USGS from 1963 to 2003.

SPARQL Endpoint:
Directly query the latest data set

Using Virtuoso SPARQL Endpoint queries the knowledge base. The default graph of the knowledge base is